x86 Instruction Set Reference

MOVAPD

Move Aligned Packed Double-Precision Floating-Point Values

Opcode Mnemonic Description
66 0F 28 /r MOVAPD xmm1, xmm2/m128 Move packed double-precision floating-point values from xmm2/m128 to xmm1.
66 0F 29 /r MOVAPD xmm2/m128, xmm1 Move packed double-precision floating-point values from xmm1 to xmm2/m128.
Description

Moves a double quadword containing two packed double-precision floating-point values from the source operand (second operand) to the destination operand (first operand). This instruction can be used to load an XMM register from a 128-bit memory location, to store the contents of an XMM register into a 128-bit memory location, or to move data between two XMM registers.

When the source or destination operand is a memory operand, the operand must be aligned on a 16-byte boundary or a general-protection exception (#GP) will be generated.

To move double-precision floating-point values to and from unaligned memory locations, use the MOVUPD instruction.

Operation
Destination = Source;
//#GP if Source or Destination unaligned memory operand
SIMD Floating-Point Exceptions
None.
Protected Mode Exceptions
#GP(0)For an illegal memory operand effective address in the CS, DS, ES, FS or GS segments. If a memory operand is not aligned on a 16-byte boundary, regardless of segment.
#GP(0)For an illegal memory operand effective address in the CS, DS, ES, FS or GS segments. If a memory operand is not aligned on a 16-byte boundary, regardless of segment.
#SS(0)For an illegal address in the SS segment.
#PF(fault-code)For a page fault.
#NMIf TS in CR0 is set.
Real-Address Mode Exceptions
#GP(0)If a memory operand is not aligned on a 16-byte boundary, regardless of segment. If any part of the operand lies outside the effective address space from 0 to FFFFH.
#GP(0)If a memory operand is not aligned on a 16-byte boundary, regardless of segment. If any part of the operand lies outside the effective address space from 0 to FFFFH.
#NMIf TS in CR0 is set.
Virtual-8086 Mode Exceptions
Same exceptions as in Real Address Mode
#PF(fault-code)For a page fault.
Instruction Latency Throughput Execution Unit
CPUID0F3n/0F2n0F3n/0F2n0F2n
MOVAPD xmm, xmm6/61/1FP_MOVE